JPH0521382B2 - - Google Patents
Info
- Publication number
- JPH0521382B2 JPH0521382B2 JP59210660A JP21066084A JPH0521382B2 JP H0521382 B2 JPH0521382 B2 JP H0521382B2 JP 59210660 A JP59210660 A JP 59210660A JP 21066084 A JP21066084 A JP 21066084A JP H0521382 B2 JPH0521382 B2 JP H0521382B2
- Authority
- JP
- Japan
- Prior art keywords
- scanning
- signal
- recording
- speed
- light beam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000003287 optical effect Effects 0.000 claims description 16
- 238000004364 calculation method Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D15/00—Component parts of recorders for measuring arrangements not specially adapted for a specific variable
- G01D15/14—Optical recording elements; Recording elements using X-or nuclear radiation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D9/00—Recording measured values
- G01D9/42—Recording indications of measuring instruments by photographic means, e.g. of counters
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Facsimile Scanning Arrangements (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Fax Reproducing Arrangements (AREA)
- Optical Recording Or Reproduction (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、記録信号に基づいて変調されたレー
ザビーム等の光ビームを記録媒体上に走査させて
一定の情報を記録する記録走査装置であつて、上
記光ビームの走査速度変動に基づくノイズが記録
媒体上に記録されるのを回避する走査速度変動補
正手段を備えた記録走査装置に関する。Detailed Description of the Invention (Industrial Application Field) The present invention is a recording scanning device that records certain information by scanning a recording medium with a light beam such as a laser beam modulated based on a recording signal. In particular, the present invention relates to a recording/scanning apparatus including a scanning speed fluctuation correcting means for avoiding noise caused by the fluctuation of the scanning speed of the light beam from being recorded on a recording medium.
（発明の技術的背景および従来技術）
走査用の光ビームを発する光源と、上記光ビー
ムを記録信号に基づいて変調する光変調器と、該
光変調器から出力された光ビームを記録媒体上に
走査させる走査手段とを備えて成る記録走査装置
が従来から知られている。(Technical Background and Prior Art) A light source that emits a scanning light beam, a light modulator that modulates the light beam based on a recording signal, and a light beam output from the light modulator that emits a light beam onto a recording medium. A recording/scanning device comprising a scanning means for scanning a document is conventionally known.
かかる記録走査装置においては、光変調器から
出力された光ビーム（記録光）を、ガルバノメー
タミラー等の走査手段で偏向させてフイルムある
いは感光紙等の記録媒体上に走査させるので、走
査手段の運動速度の変動、例えばガルバノメータ
ミラーの首振り運動の変動に起因して、走査速度
（記録光が記録媒体上を走る速度）が変動する場
合がある。このように走査速度が変動すると、該
走査によつて記録媒体に記録される情報中に走査
速度変動に起因するノイズが含まれることとな
り、高精度の情報記録を行なうことができなくな
る。 In such a recording/scanning device, a light beam (recording light) output from an optical modulator is deflected by a scanning means such as a galvanometer mirror and scanned onto a recording medium such as a film or photosensitive paper, so that the movement of the scanning means is Due to variations in velocity, for example variations in the oscillating motion of the galvanometer mirror, the scanning velocity (the velocity at which the recording light travels over the recording medium) may vary. When the scanning speed fluctuates in this way, noise caused by the scanning speed fluctuation is included in the information recorded on the recording medium by the scanning, making it impossible to record information with high precision.
この様な走査速度変動による不都合を排除する
方法の一つとして、一般的に考えられるのは、変
動の原因となる走査手段自体の運動速度を制御
し、走査手段の速度変動成分を除去する方法であ
る。 One of the methods generally considered to eliminate the inconvenience caused by such fluctuations in scanning speed is to control the movement speed of the scanning means itself, which causes the fluctuations, and eliminate the speed fluctuation component of the scanning means. It is.
しかしながら、その速度変動成分のうち低周波
数成分は走査手段自体を制御することによつて除
去することができるが、高周波数成分は走査手段
自体を制御しようとしても制御が追いつかないの
で除去することは困難である。 However, among the speed fluctuation components, the low frequency component can be removed by controlling the scanning means itself, but the high frequency component cannot be removed even if you try to control the scanning means itself because the control cannot keep up. Have difficulty.
（発明の目的）
本発明の目的は、上記事情に鑑み、走査手段の
速度を制御するのではなく、光変調器に入力する
記録信号に走査速度変動に応じた補正を施すこと
により、高周波数成分をも含む広い周波数範囲に
おいて、走査速度変動に基づくノイズが記録媒体
上に記録されるのを回避することができる走査速
度変動補正手段を備えた記録走査装置を提供する
ことにある。(Objective of the Invention) In view of the above circumstances, an object of the present invention is not to control the speed of the scanning means, but to correct high frequency It is an object of the present invention to provide a recording/scanning device equipped with a scanning speed fluctuation correcting means that can prevent noise due to scanning speed fluctuations from being recorded on a recording medium in a wide frequency range including the components.
（発明の構成）
本発明に係る記録走査装置は、上記目的を達成
するため、走査手段から出射される光ビームの走
査速度変動の低周波数成分と共に高周波数成分を
も含む走査速度を検出してその走査速度に関する
信号を出力する速度検出手段と、その速度信号と
記録すべき情報を担持した記録信号との間で演算
を行なつてその結果を光変調器に入力させる変調
信号として出力する演算手段とから成る走査速度
変動補正手段を備えたことを特徴とする。(Structure of the Invention) In order to achieve the above object, a recording/scanning device according to the present invention detects a scanning speed including a high frequency component as well as a low frequency component of a scanning speed fluctuation of a light beam emitted from a scanning means. A speed detection means that outputs a signal related to the scanning speed, and a calculation that performs a calculation between the speed signal and a recording signal carrying information to be recorded, and outputs the result as a modulation signal to be input to an optical modulator. The present invention is characterized by comprising a scanning speed fluctuation correcting means comprising means.
上記演算手段は、基本的には、上記速度信号と
記録信号との間で掛算もしくは割算を行なう演算
器、即ち掛算器もしくは割算器によつて構成され
る。掛算もしくは割算のどちらを行なうかは記録
媒体の性質によつて決定される。 The arithmetic means basically comprises an arithmetic unit that multiplies or divides the speed signal and the recording signal, that is, a multiplier or a divider. Whether to perform multiplication or division is determined by the characteristics of the recording medium.
（実施態様）
以下、図面を参照しながら本発明の実施態様に
について説明する。(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the drawings.
図は、本発明に係る記録走査装置の一実施態様
を示すブロツク図である。 The figure is a block diagram showing one embodiment of the recording and scanning device according to the present invention.
図示の装置は、光源１０と、光変調器２０と、
走査手段３０と、走査速度検出手段４０と、走査
速度信号Ｖと記録信号Ｉとを演算して光変調器２
０への変調信号Ｍとして出力する演算手段５０と
を備えて成る。 The illustrated device includes a light source 10, a light modulator 20,
The scanning means 30, the scanning speed detection means 40, the scanning speed signal V and the recording signal I are operated to calculate the optical modulator 2.
0 as a modulation signal M.
上記光源１０は、フイルムや感光紙等の記録媒
体１１上を走査するレーザビーム等の光ビーム１
２を発する。光ビーム１２は光変調器２０によつ
て変調され、走査手段３０で偏向されて記録媒体
１１上を走査し、該光ビーム１２に担持されてい
る一定の情報を記録媒体上に記録する。 The light source 10 is a light beam 1 such as a laser beam that scans a recording medium 11 such as a film or photosensitive paper.
Emit 2. The light beam 12 is modulated by a light modulator 20 and deflected by a scanning means 30 to scan over the recording medium 11 and record certain information carried in the light beam 12 onto the recording medium.
光変調器２０は、入射する光ビーム１２を、変
調信号Ｍに基づいて変調し、該変調信号に担持さ
れた情報を担持する記録光１２として出力するも
のであり、該変調器２０としては音響光学変調
器、電気光学変調器等種々の変調器を使用するこ
とができる。 The optical modulator 20 modulates the incident light beam 12 based on a modulation signal M and outputs it as recording light 12 carrying information carried by the modulation signal. Various modulators can be used, such as optical modulators, electro-optic modulators, etc.
上記走査手段３０は、上記記録光１２を上記記
録媒体１１上に走査させる手段であり、該手段３
０としてはガルバノメータミラー、回転多面鏡、
あるいはホログラム等の光偏向器が使用される。 The scanning means 30 is a means for scanning the recording light 12 onto the recording medium 11.
0 is a galvanometer mirror, a rotating polygon mirror,
Alternatively, an optical deflector such as a hologram is used.
上記走査速度検出手段４０は、上記走査手段３
０から出射された記録光１２の走査速度を検出
し、その走査速度変動の低周波数変動成分から高
周波数変動成分までの広い周波数変動成分を含む
走査速度に関する信号を出力する手段であり、本
実施態様では、光源１０から発せられる光ビーム
の一部を光源１０と光変調器２０との間に配設し
たハーフミラー１５で取り出し、それを記録光１
２と同様に走査手段３０に入射させて出射させる
ことにより、走査手段３０から出射される記録光
１２に対応する速度で偏向される同期光１６を形
成し、この同期光１６の速度を検出することによ
つて記録光１２の走査速度を検出するように構成
してある。同期光１６としては別個の光源（図示
せず）から発せられたものを使用し、それを走査
手段３０に入射させるようにしても良い。同期光
１６の速度検出は、同期光１６が通過するグリツ
ド４１と、該グリツド４１を通過した光パルスを
検出して電気パルスを出力する光検出器４２と、
該検出器４２から入力された信号を走査速度信号
Ｖとして出力する周波数−電圧変換器４３とから
成つている。なお、記録光１２の走査方向は図中
紙面に垂直な方向であり、記録媒体１１は矢印Ｂ
方向に副走査される。本手段４０から出力される
信号Ｖは、周波数−電圧変換器４３から出力され
る信号そのものであつても良く、あるいはその信
号に増幅等の種々の信号処理を施したものであつ
ても良い。 The scanning speed detection means 40 detects the scanning speed of the scanning means 3.
This means detects the scanning speed of the recording light 12 emitted from zero and outputs a signal related to the scanning speed that includes a wide frequency fluctuation component from a low frequency fluctuation component to a high frequency fluctuation component of the scanning speed fluctuation. In this embodiment, a part of the light beam emitted from the light source 10 is taken out by a half mirror 15 disposed between the light source 10 and the optical modulator 20, and is converted into the recording light 1.
2, the synchronizing light 16 is deflected at a speed corresponding to the recording light 12 emitted from the scanning means 30 by entering the scanning means 30 and emitting it, and the speed of this synchronizing light 16 is detected. In particular, the scanning speed of the recording light 12 is detected. The synchronizing light 16 may be emitted from a separate light source (not shown) and may be made incident on the scanning means 30. The speed of the synchronizing light 16 is detected by a grid 41 through which the synchronizing light 16 passes, a photodetector 42 which detects the optical pulse that has passed through the grid 41, and outputs an electric pulse.
A frequency-voltage converter 43 outputs the signal inputted from the detector 42 as a scanning speed signal V. Note that the scanning direction of the recording light 12 is perpendicular to the plane of the paper in the figure, and the recording medium 11 is
sub-scan in the direction. The signal V output from this means 40 may be the signal itself output from the frequency-voltage converter 43, or may be a signal subjected to various signal processing such as amplification.
上記演算手段５０は、基本的には記録媒体１１
に記録すべき情報を担持した記録信号Ｉと速度信
号Ｖとの間で掛算もしくは割算を行なつてその結
果を光変調器に入力させる変調信号Ｍとして出力
するものであり、従つてこの演算手段５０は、最
も単純には単なる掛算器もしくは割算器によつて
構成され得るが、本実施態様においては、両信号
ＶとＩとの間で掛算もしくは割算を行なつてその
結果を補正信号Ａとして出力する演算器（具体的
には掛算器もしくは割算器）５１と、この補正信
号Ａを上記記録信号Ｉに加算してその結果を変調
信号Ｍとして出力する加算器５２とで構成されて
いる。 The calculation means 50 basically consists of the recording medium 11
Multiplication or division is performed between the recording signal I carrying information to be recorded on the speed signal V and the speed signal V, and the result is output as the modulation signal M to be input to the optical modulator. The means 50 can most simply be constituted by a simple multiplier or divider, but in this embodiment, it multiplies or divides both signals V and I and corrects the result. Consists of an arithmetic unit (specifically, a multiplier or a divider) 51 that outputs a signal A, and an adder 52 that adds this correction signal A to the recording signal I and outputs the result as a modulation signal M. has been done.
記録信号Ｉと速度信号Ｖとを掛算もしくは割算
してその結果を変調信号Ｍとして光変調器２０に
入力することによつて、光変調器２０から出射さ
れる記録光は、本来記録されるべき情報（記録信
号Ｉに担持されている情報）に走査速度変動分が
組み合わされた情報を担持することとなり、この
記録光が走査手段３０を介して記録媒体１１上に
走査される際走査速度の変動によつて上記組み合
わされた走査速度変動分が排除され、結局記録媒
体１１には本来記録されるべき情報のみがそのま
ま正確に記録されることとなるものである。 By multiplying or dividing the recording signal I and the speed signal V and inputting the result to the optical modulator 20 as a modulation signal M, the recording light emitted from the optical modulator 20 is originally recorded. When this recording light is scanned onto the recording medium 11 via the scanning means 30, the scanning speed changes. As a result of the fluctuation in the above-mentioned combination of scanning speed fluctuations, the above-mentioned combined scanning speed fluctuations are eliminated, and in the end, only the information that should originally be recorded is accurately recorded as it is on the recording medium 11.
本実施態様における演算器５１と加算器５２と
の組み合せは、上記両信号ＶとＩとを掛算もしく
は割算して変調信号を出力する演算手段の一つの
好ましい具体例であり、この様な演算形態をとる
ことによつて走査速度変動によるノイズをより適
切に排除することができるものである。 The combination of the arithmetic unit 51 and the adder 52 in this embodiment is one preferable specific example of arithmetic means that multiplies or divides the above-mentioned signals V and I to output a modulated signal. By adopting this configuration, noise caused by fluctuations in scanning speed can be more appropriately eliminated.
次に、本実施態様における演算方法の一例につ
いて具体的に説明する。 Next, an example of the calculation method in this embodiment will be specifically explained.
記録媒体１１に記録される信号の大きさが、記
録光の露光量に比例する場合（例えば記録媒体１
１として写真フイルムを用い、この写真フイルム
のＨ−Ｄ特性曲線上の直線部分に相当する範囲の
露光量で記録を行なう場合）、光変調器２０から
出射される記録光の光強度をＰとし、走査速度を
Ｖとすると記録媒体１１への記録光の露光量Ｅは
次式で表わされる。 When the magnitude of the signal recorded on the recording medium 11 is proportional to the exposure amount of the recording light (for example, when the magnitude of the signal recorded on the recording medium 11 is
(1) When using a photographic film and recording with an exposure amount in a range corresponding to the straight line portion on the HD characteristic curve of this photographic film), let P be the light intensity of the recording light emitted from the optical modulator 20. , when the scanning speed is V, the exposure amount E of the recording light to the recording medium 11 is expressed by the following equation.
Ｅ＝ａＰ／Ｖ（ここでａは定数である） …
次に光変調器２０の特性（変調信号Ｍに対する
出射ビーム強度Ｐの関係）が次式で表わされると
する。 E=aP/V (where a is a constant)...Next, it is assumed that the characteristics of the optical modulator 20 (the relationship between the output beam intensity P and the modulation signal M) are expressed by the following equation.
Ｐ＝bM〓（ここでｂ，αは定数） … 式と式より次式で得られる。 P=bM〓 (here b and α are constants)... From the equations and equations, it can be obtained as follows.
Ｅ＝abM〓／Ｖ …
いま、仮りに走査速度ＶがVo→Vo＋ΔVに変動
した場合、変調信号ＭをMo→Mo＋ΔMとするこ
とによつて、記録媒体１１への露光量Ｅの変動を
取り除くためには次式が満足されればよい。 E=abM〓/V... Now, if the scanning speed V fluctuates from Vo to Vo+ΔV, by changing the modulation signal M from Mo to Mo+ΔM, the variation in the exposure amount E to the recording medium 11 is removed. It is sufficient that the following formula is satisfied.
Ｅ｜ ―Ｅ｜ ＝０
Ｖ＝Vo＋ΔV Ｖ＝Vo
Ｍ＝Mo＋ΔM Ｍ＝Mo …
式、式より、順次式を変形すると、
ab｛（Mo＋ΔM）〓／Vo＋ΔV｝−abMo〓／Vo＝０
abMo〓／Vo｛（１＋ΔM／Mo）〓／１＋ΔV／Vo−１
｝＝０
（１＋ΔM／Mo）〓／１＋ΔV／Vo−１＝０
（１＋ΔM／Mo）〓−（１＋ΔV／Vo）＝０ …
いま、Mo＞＞ΔMとすると次の近似が成立す
る。E｜ -E｜ = 0 V=Vo+ΔV V=Vo M=Mo+ΔM M=Mo … From formulas and formulas, if we transform the formulas in sequence, ab{(Mo+ΔM)〓/Vo+ΔV}−abMo〓/Vo=0 abMo〓/ Vo{(1+ΔM/Mo)〓/1+ΔV/Vo−1
}=0 (1+ΔM/Mo)/1+ΔV/Vo−1=0 (1+ΔM/Mo)−(1+ΔV/Vo)=0 Now, if Mo>>ΔM, the following approximation holds.
（１＋ΔM／Mo）〓≒１＋α・ΔM／Mo …
式、式より、順次式を変形すると
１＋α・ΔM／Mo−（１＋ΔV／Vo）＝０
α・ΔM／Mo＝ΔV／Vo
ΔM＝ΔV・Mo／α・Vo …
Moと記録信号Ｉの間には
Mo＝βI（ここでβは定数）
なる関係があるから、式は次のように変形でき
る。 (1+ΔM/Mo)〓≒1+α・ΔM/Mo … From the formula and formula, if we transform the formulas in sequence: 1+α・ΔM/Mo− (1+ΔV/Vo)=0 α・ΔM/Mo=ΔV/Vo ΔM=ΔV・Mo /α·Vo... Since there is a relationship between Mo and the recording signal I as follows: Mo=βI (here β is a constant), the equation can be transformed as follows.
ΔM＝ΔV・βI／αVo
＝｛（Vo＋ΔV）−Vo｝βI／αVo
＝（Ｖ−Vo）βI／αVo
＝−β／α・Ｉ＋β／αVo・Ｖ・Ｉ
従つてＭは
Ｍ＝Mo＋ΔM
＝βI−β／α・Ｉ＋β／αVo・Ｖ・Ｉ
＝β（１−１／α）Ｉ＋β／αVo・Ｖ・Ｉ …
ここでα，βは定数であり、Voは一定値なので
Ｍ＝ｋ・Ｉ＋ｌ・Ｖ・Ｉ（ここでｋ，ｌは定数）
…
と表わすことができる。 ΔM = ΔV・βI/αVo = {(Vo+ΔV)−Vo}βI/αVo = (V−Vo) βI/αVo = −β/α・I+β/αVo・V・I Therefore, M is M=Mo+ΔM =βI− β/α・I+β/αVo・V・I = β(1-1/α)I+β/αVo・V・I … Here, α and β are constants, and Vo is a constant value, so M=k・I+l・V・I (here k, l are constants)
It can be expressed as...
すなわち、記録信号Ｉと走査速度信号Ｖの掛算
の結果をある比率で記録信号Ｉに加算した信号を
変調信号Ｍとして用いることにより、走査速度の
変動による露光量の変動を除去することができ
る。 That is, by using a signal obtained by adding the result of multiplication of the recording signal I and the scanning speed signal V to the recording signal I at a certain ratio as the modulation signal M, it is possible to eliminate fluctuations in the exposure amount due to fluctuations in the scanning speed.
（発明の効果）
本発明に係る記録走査装置は、上記の如く、光
ビーム走査速度検出手段と、この速度検出手段か
ら出力される走査速度の低周波数変動成分のみで
なく高周波数変動成分をも含む速度信号と記録す
べき情報を担持した記録信号とを演算（掛算もし
くは割算）する演算手段とを備えて成り、この演
算手段によつて演算された結果を光変調器に変調
信号として入力させるように構成されている。(Effects of the Invention) As described above, the recording and scanning device according to the present invention includes a light beam scanning speed detection means and a scanning speed that detects not only the low frequency fluctuation component but also the high frequency fluctuation component of the scanning speed output from the speed detection means. and a calculation means for calculating (multiplying or dividing) the speed signal containing the information to be recorded and the recording signal carrying the information to be recorded, and inputting the result calculated by the calculation means to the optical modulator as a modulation signal. It is configured to allow
従つて、上記の如き変調信号によつて光ビーム
を変調することにより、記録光には真に記録しよ
うとする情報（記録信号に担持されている情報）
が走査速度変動分に対応して予め変形された状態
で担持されることとなり、この記録光が走査手段
によつて記録媒体上に走査される際の走査速度の
変動によつて上記予め行なわれた変形が打ち消さ
れ、結局記録媒体上に記録される情報は上記真に
記録しようとする情報のみが正確に記載されるこ
ととなる。 Therefore, by modulating the light beam with the above modulation signal, the information to be truly recorded (information carried in the recording signal) can be recorded in the recording light.
is carried in a state that has been deformed in advance in accordance with the variation in scanning speed, and the above-mentioned deformation is carried out in advance by variation in the scanning speed when this recording light is scanned onto the recording medium by the scanning means. This deformation is canceled out, and in the end, only the information that is truly intended to be recorded is accurately recorded on the recording medium.
即ち、本発明によれば、光ビームの走査速度の
変動、換言すれば走査手段の運動速度変動に基づ
くノイズが記録媒体に記録されるのを回避するこ
とが可能であり、かつ変調信号として記録信号と
速度信号とを演算したものを使用することによつ
て回避するので、高周波成分までも含む広い周波
数範囲にわたつて十分なノイズ回避を行なうこと
ができる。 That is, according to the present invention, it is possible to avoid recording noise on the recording medium due to fluctuations in the scanning speed of the light beam, in other words, fluctuations in the movement speed of the scanning means, and it is possible to avoid recording noise on the recording medium as a modulated signal. Since noise is avoided by using a calculated signal and speed signal, sufficient noise can be avoided over a wide frequency range including even high frequency components.
図は、本発明に係る装置の一実施態様を示すブ
ロツク図である。
１０…光源、１１…記録媒体、１２…光ビー
ム、３０…走査手段、４０…速度検出手段、５０
…演算手段。
The figure is a block diagram showing one embodiment of the device according to the invention. 10... Light source, 11... Recording medium, 12... Light beam, 30... Scanning means, 40... Speed detection means, 50
...Calculating means.
Claims (1)
ームを記録信号に基づいて変調する光変調器と、
該光変調器から出射された光ビームを記録媒体上
に走査させる走査手段とを備えて成る記録走査装
置において、上記走査手段から出射される光ビー
ムの走査速度を検出してその走査速度変動の低周
波数成分と共に高周波数成分をも含む走査速度に
関する信号を出力する速度検出手段と、該速度検
出手段から出力される速度信号と上記記録信号と
の間で演算を行なつてその結果を上記光変調器へ
入力させる変調信号として出力する演算手段とか
ら成る走査速度変動補正手段を備えた記録走査装
置。 ２ 上記演算手段が、上記速度信号と上記記録信
号との間で掛算もしくは割算を行なつてその結果
を上記変調信号として出力する演算器であること
を特徴とする特許請求の範囲第１項に記載の走査
速度変動補正手段を備えた記録走査装置。 ３ 上記演算手段が、上記速度信号と上記記録信
号との間で掛算もしくは割算を行なつてその結果
を補正信号として出力する演算器と、この補正信
号と上記記録信号とを加算して上記変調信号とし
て出力する加算器とから成ることを特徴とする特
許請求の範囲第１項に記載の走査速度変動補正手
段を備えた記録走査装置。 ４ 上記速度検出手段が、グリツドとその後方に
設けられた光検出器から成ることを特徴とする特
許請求の範囲第１項ないし第３項いずれかに記載
の走査速度変動補正手段を備えた記録走査装置。[Claims] 1. A light source that emits a scanning light beam, an optical modulator that modulates the light beam based on a recording signal,
A recording/scanning device comprising scanning means for scanning a recording medium with a light beam emitted from the optical modulator, detects the scanning speed of the light beam emitted from the scanning means and detects fluctuations in the scanning speed. A speed detection means outputs a signal related to the scanning speed that includes high frequency components as well as low frequency components, and a calculation is performed between the speed signal output from the speed detection means and the recording signal, and the result is output to the light beam. A recording/scanning apparatus comprising a scanning speed fluctuation correction means comprising a calculation means for outputting a modulation signal to be input to a modulator. 2. Claim 1, wherein the arithmetic means is an arithmetic unit that multiplies or divides the speed signal and the recording signal and outputs the result as the modulation signal. A recording/scanning device comprising the scanning speed fluctuation correction means described in . 3 The calculation means includes a calculation unit that multiplies or divides the speed signal and the recording signal and outputs the result as a correction signal, and adds the correction signal and the recording signal to the 2. A recording/scanning apparatus equipped with a scanning speed fluctuation correction means according to claim 1, further comprising an adder that outputs a modulated signal. 4. A recording device equipped with scanning speed fluctuation correction means according to any one of claims 1 to 3, wherein the speed detection means comprises a grid and a photodetector provided behind the grid. scanning device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59210660A JPS6189765A (en) | 1984-10-08 | 1984-10-08 | Recording scanner |
| US06/780,667 US4620200A (en) | 1984-10-08 | 1985-09-26 | Scan beam velocity-compensation recording system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59210660A JPS6189765A (en) | 1984-10-08 | 1984-10-08 | Recording scanner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6189765A JPS6189765A (en) | 1986-05-07 |
| JPH0521382B2 true JPH0521382B2 (en) | 1993-03-24 |
Family
ID=16592991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59210660A Granted JPS6189765A (en) | 1984-10-08 | 1984-10-08 | Recording scanner |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US4620200A (en) |
| JP (1) | JPS6189765A (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4853710A (en) * | 1985-11-29 | 1989-08-01 | Ricoh Co., Ltd. | Imaging by laser beam scanning |
| US4926348A (en) * | 1986-12-05 | 1990-05-15 | Royal Melbourne Institute Of Technology Limited | Plotting apparatus using a light source moved on a photosensitive surface |
| JPS63186225A (en) * | 1987-01-28 | 1988-08-01 | Minolta Camera Co Ltd | Control device for optical system scanning |
| JPS6467073A (en) * | 1987-09-07 | 1989-03-13 | Fuji Photo Film Co Ltd | Picture signal correcting method |
| JPH01240072A (en) * | 1988-03-18 | 1989-09-25 | Fuji Photo Film Co Ltd | Picture recorder |
| EP0343995B1 (en) * | 1988-05-27 | 1994-07-20 | Tokyo Electric Co., Ltd. | Scanner motor controller for controlling the rotating speed of a scanner motor |
| US5504517A (en) * | 1991-04-04 | 1996-04-02 | Canon Kabushiki Kaisha | Laser scanner control circuit which is used in image forming apparatus and driver IC for use in such a circuit |
| US6122068A (en) * | 1991-06-17 | 2000-09-19 | Canon Kabushiki Kaisha | Image forming apparatus |
| US6040586A (en) * | 1998-05-05 | 2000-03-21 | The Perkin-Elmer Corporation | Method and system for velocity-normalized position-based scanning |
| US7145588B2 (en) * | 2004-02-27 | 2006-12-05 | Eastman Kodak Company | Scanning optical printhead having exposure correction |
| US20070019515A1 (en) * | 2005-07-21 | 2007-01-25 | Nobuyoshi Kaima | Optical writing device, optical writing method, and image forming apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60123168A (en) * | 1983-12-06 | 1985-07-01 | Dainippon Screen Mfg Co Ltd | Correcting method of shading |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4422083A (en) * | 1979-05-24 | 1983-12-20 | American Hoechst Corporation | System and method for producing artwork for printed circuit boards |
| US4387983A (en) * | 1979-07-03 | 1983-06-14 | Canon Kabushiki Kaisha | Scan type image recording apparatus |
| US4307409A (en) * | 1980-05-27 | 1981-12-22 | Sperry Corporation | Multi-aperture, feedback system for a laser scanner |
-
1984
- 1984-10-08 JP JP59210660A patent/JPS6189765A/en active Granted
-
1985
- 1985-09-26 US US06/780,667 patent/US4620200A/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60123168A (en) * | 1983-12-06 | 1985-07-01 | Dainippon Screen Mfg Co Ltd | Correcting method of shading |
Also Published As
| Publication number | Publication date |
|---|---|
| US4620200A (en) | 1986-10-28 |
| JPS6189765A (en) | 1986-05-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |